googletest/googlemock/test/gmock_leak_test_.cc

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// Google Mock - a framework for writing C++ mock classes.
//
// This program is for verifying that a leaked mock object can be
// caught by Google Mock's leak detector.

#include "gmock/gmock.h"

namespace {

using ::testing::Return;

class FooInterface {
 public:
  virtual ~FooInterface() = default;
  virtual void DoThis() = 0;
};

class MockFoo : public FooInterface {
 public:
  MockFoo() = default;

  MOCK_METHOD0(DoThis, void());

 private:
  MockFoo(const MockFoo&) = delete;
  MockFoo& operator=(const MockFoo&) = delete;
};

TEST(LeakTest, LeakedMockWithExpectCallCausesFailureWhenLeakCheckingIsEnabled) {
  MockFoo* foo = new MockFoo;

  EXPECT_CALL(*foo, DoThis());
  foo->DoThis();

  // In order to test the leak detector, we deliberately leak foo.

  // Makes sure Google Mock's leak detector can change the exit code
  // to 1 even when the code is already exiting with 0.
  exit(0);
}

TEST(LeakTest, LeakedMockWithOnCallCausesFailureWhenLeakCheckingIsEnabled) {
  MockFoo* foo = new MockFoo;

  ON_CALL(*foo, DoThis()).WillByDefault(Return());

  // In order to test the leak detector, we deliberately leak foo.

  // Makes sure Google Mock's leak detector can change the exit code
  // to 1 even when the code is already exiting with 0.
  exit(0);
}

TEST(LeakTest, CatchesMultipleLeakedMockObjects) {
  MockFoo* foo1 = new MockFoo;
  MockFoo* foo2 = new MockFoo;

  ON_CALL(*foo1, DoThis()).WillByDefault(Return());
  EXPECT_CALL(*foo2, DoThis());
  foo2->DoThis();

  // In order to test the leak detector, we deliberately leak foo1 and
  // foo2.

  // Makes sure Google Mock's leak detector can change the exit code
  // to 1 even when the code is already exiting with 0.
  exit(0);
}

}  // namespace